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Related Experiment Video

Updated: Jan 15, 2026

Rapid Formation and Testing of Self-expanding NiTi Frames with a Small Form Factor Suitable for Minimally Invasive Implants
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754

Dual-Array Nano Configuration for High-Performance Metastable β Titanium Alloys.

Tianle Li1, Renhao Wu2, Jiabao Liu1

  • 1School of Material Science and Engineering, Changsha University of Science & Technology, Changsha, 410004, China.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|January 14, 2026
PubMed
Summary

This study reveals a novel metastable titanium alloy with exceptional strength and ductility at 500°C. Its unique dual-array nano structure formation enhances high-temperature performance for advanced engineering applications.

Keywords:
dislocation interactionsdual‐array configurationhigh‐temperature mechanical propertiesmetastable β titanium alloynano α grain

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Area of Science:

  • Materials Science
  • Metallurgy
  • Mechanical Engineering

Background:

  • High-temperature failures in metallic components necessitate understanding strength-ductility trade-offs.
  • Developing advanced titanium alloys for elevated temperature applications is crucial.

Purpose of the Study:

  • Investigate the mechanical properties of a specific metastable beta titanium alloy at high temperatures.
  • Elucidate the microstructural evolution and mechanisms responsible for superior performance.

Main Methods:

  • Mechanical testing of a metastable beta titanium alloy (Ti-15.1Mo-3.1Nb-2.77Al-0.21Si) at 500 °C.
  • Microstructural analysis focusing on phase transformation and nano-phase formation.
  • Investigating dislocation slip and thermal activation effects.

Main Results:

  • The alloy achieved an ultimate tensile strength of 863 MPa and 78.3% elongation at 500 °C.
  • Observed continuous and strong work hardening rate (2000-3100 MPa).
  • Identified dual-array nano configuration of alpha phase (≈68% density, ≈10 nm width) driven by dislocation slip and thermal activation.

Conclusions:

  • Hierarchical microstructural evolutions, including phase transformation and dual-array nano alpha grains, contribute to excellent high-temperature mechanical properties.
  • Dynamic nano alpha precipitation with unique dual-array configurations offers new avenues for high-performance metastable titanium alloys.
  • Findings provide insights for designing titanium alloys for extreme temperature environments.